OP, perhaps you accessed their platform from a restricted jurisdiction? Your screenshot of the email says the Risk Department made the decision to block your account.
Australia, Austria, Comoros, France, Germany, Netherlands, Spain, United Kingdom, USA, Sanctioned jurisdictions, FATF blacklist jurisdictions and/or any other jurisdictions deemed prohibited by Anjouan Offshore Financial Authority or Qzino Risk and Compliance department ("Restricted Jurisdiction") that are reported by us from time to time.
There's also this part:
4. Restricted use
4.1. You are not allowed to use the Service if:
4.1.1. You are under 18 (or under the legal age in your jurisdiction) or cannot legally enter into an agreement with us, including acting on behalf of someone who is underage.
4.1.2. You live in a country where online gambling is illegal for residents or anyone in that territory.
But, no matter what the basis is for this decision, your funds should be returned to you. I see no reason for them to keep it.